Machine for producing wood fiber



Nu. 624,938. Pamnted `may le, |999.

H. M. HOVER.V

MACHINE FOB PHODUCING WUUD FIBER.

(Application Bled Sept, 1, 1898.)

(No Model.) 2 Sheets-Sheet l.

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'y y Patented may ls, |899. H. M. HOOVER. 'mAcH-ms? Fun Pnonucms wwnsa.

(Application filed Sept. 1, 1898.)

2 Sheets-Sheet 2.

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UNTTED STATES PATENT OFFICE.

HORACE M. HOOVER, OF PERRYSBURG, OHIO.

MACHINE FOR PRODUCING WOOD FI'IBER.

' SPECIFICATION forming part of Letters Patent No. 624,938, dated May `1c, 1899.

, Appiaaaonaeasepamtri,1898. saturo. 689,981. mamada.)

To @ZZ whom t may concern:

Be it known that I, HORACE M. HOOVER,

' of Perrysburg, county of Wood, and State of Ohio, have inventedcertain new and useful lImprovements in Machines for Producing WoodFiber; and I do hereby declare that the following is a full, clear, andexact description of the invention7 which will enable others skilled'inthe art -towhich it appertains to make and use the same, reference beinghad tothe accompanying drawings,'and to the iigures of reference markedthereon, which form part of this specification.

My invention relates to a machine for producing wood ber, and has forits object to provide a mechanism whereby there may be manufactured afibrous product from ajsolid bolt of wood. The product is designed moreparticularly for use as a base for plaster for plastering material, andtherefore it is essential that the disintegrated wood shall be iibrousas eontradistinguished from the product in grinding the bolt forwood-pulp as used in the manufacture of indurated ber goods. I haveprovided for producing the liber from the wood longitudinally of thebolt or, in other words, coincident with the grain of the wood, wherebythere is produced 4a liber of the desired length, and have provided fora feed of the bolt whereby the fiber may be of extreme neness.

In the drawings, Figure l is a front elevation of a machine constructedaccording to my improvement. Fig. 2 is a rear elevation of the same.Fig. 3 is a plan of the same. Fig. 4 is a section on the line a: as,Fig. 3, looking in the direction of the arrow.

Referring now to the details of the drawings, 1 designates standardssupporting the bed 2, and which has secured upon its face and one endthereof, in diametrically opposite position, standards 3, in which isjournaled an arbor 4, having mounted thereon a .plu-

rality of saws 5, spaced equidistant and in oblique position to themandrel. The obliquity is such as to present a revolving reciprocatingcutting edge to a bolt of wood 6, fed thereto by the operation of themechanism, and which cutting edge is thereby adapted to reduce the boltof wood 6 into a brous material by-the reciprocating movement resultingfrom the Obliquity of the saws upon the arbor 4 during the revolutionthereof.

The bolt of wood G is fed to the saws and is supported upon one end by aspur 7, having formed thereon a tenon S, adapted to enter a socket 9,which is formed in the inner end of the mandrel 10. The opposite end ofthe bolt is supported by a movable centeringpin 12. Both the mandrel andpin are supported and journaled in brackets 13, integral iwith acarriage 14, supported upon and held in ways 15, formed uponthe face ofthe bed 2 in parallel alinement.

The bolt of `wood is caused to revolve during its reduction to fiber,and I have therefore devised means for gradually increasing the velocityof the revolving bolt of wood 6 as its diameter is reduced by thecutting of the gang of saws. One end of the arbor 4 projects beyond thebed-plate and has secured thereon a driven pulley 16 and adriving-pulley 17, (see Fig. 2,) from which motion is transmitted bymeans of a belt 18 to a pulley 19, mounted upon lan arbor 20, which isjournaled in brackets 21, secured to the side of the bed 2. From thearbor 2O motion is transmitted to an .arbor 22 by means of anintermeshing miter-gear 23. The arbor 22 is also held in the brackets 21and ismovably supported upon the opposite end in a movable bearing24mounted upon a shaft 25, ,which is journalcd in the bed of themechanism and has secured thereto a friction-disk Y 26, adapted to beengaged by a friction-pulley27, rnovably, mounted upon the arbor 22.

From the shaft 25 motion is transmitted by means of a train of gears 28,located upon the opposite end of shaft 25, from which motion istransmitted to a bevel-gear 29, secured to or integral with-a member3()l of the train of gears, and which member is journaled in abracket31, secured to the bed-plate 2. The

bevel-gear 29`is adapted to intermesh with a Y IOO mounted a worm 38upon the shaft 33, and which worm engages a coincident gear 39, securedto the mandrel 10. A feather 33 is formed longitudinally upon the shaft33, whereby revolution is transmitted by means of the worm-gear to thebolt of wood supported upon the slide.

The revolution of the mechanism as described in the foregoing will causethe bolt of wood 6 to revolve during its reduction, and in order toprovide a continuous feed as the bolt 6 is reduced I have provided atrain of gears 40, transmitting motion at a reduced velocity to an arbor41, journaled in the carriage 14. The train of gears are set in motionby means of a pinion 42, secured upon the arbor 10. The other members ofthe train of gears are secured to an arm 43, mounted upon the mandrel 10and the arbor 41. Upon the -arbor 41 of the inner side of the bed-platethere are pinions 44, adapted to engage movable rack-bars 45, which arepivotally secured at the rear of the bed.A The front end 46 isVsupported upon brackets 47, which are secured to an arbor 48, journaledin the sides of the bed. The brackets 47 are formed with steps 49 andare normally caused to hold the rack-bars 45 in operative position bymeans of springs 50, secured to an arm 5l of the bracket and to thefront standard 1 and arranged to force said arm 51 upward. The brackets47 may be moved by hand by means of handles 52, (see Fig. 3,) secured tothe arbor 48, so as to bring the rack-bars 45 into engagement with thepinions 44 or disengagement to allow free and independent movement ofthe slide.

53 designates a lever pivotally secured upon the inner side of the bed 2and is connected by means of a bar 54, pivoted to the movable bracket47. Upon the under side of the carriage 14 there is secured a pin 55,adapted to engage the projecting end 56 of the lever as the slide iscaused to traverse upon the ways toward the gang of saws. The contact ofthe pin with the free end of the lever 56 will cause a disengagement ofthe rack-bars 45 with the propelling-pinions and will cause a consequentstoppage of the slide.

57 designates a rack-bar movably secured to the side of the bed by meansof clamps 58 and has formed upon its front end a pendent eye 59, towhich may be fastened a cable or chain 60, adapted to r-un over a pulley61, which is also pivotally secured to the bedplate, and the chain hassecured to its free end a weight portion 62, adapted to retract therack-bar into its original position, as shown in Fig. 2. The lug 63 isintegral with the carriage 14 and pendent therefrom and is adapted toengage a shoulder 64, formed upon the rack-bar 57, whereby as saidcarriage travels toward the saws a simultaneous movement is transmittedto the rack-bar, which is adapted to engage a segmental toothed arc 65,which is supported in an intermeshing position by means of a bracket(shown in dotted lines) secured to the side of the bed 2. A rod 66 ispivotally secured at one end to the arc 65 and at its other end to aring 70, fitting in a groove in the frictionpulley 27, so that as thearc 65 is moved by the rack 57 the rod 66 pushes said frictionpulleyinwardly toward the center of the friction-disk 26 as the carriageapproaches the saws during the reduction of the log or bolt of wood toliber, whereby the. surface speed of the bolt is equalized during theprocess of reduction, and th us a fiber of even texture is produced.

67 designates a locking-lever pivotally se- .cured to the bracket 68 andconnected to the movable bearing 24, mounted upon the shaft 25. Theobject of this movable bearing is to provide means whereby the revolublemovement of the bolt of wood 6 may be arrested at any position withoutstopping the revolution of the saws.

It will be seen from the foregoing that in the operation a bolt of woodbeing mounted upon the carriage, the mechanism being set in motion, thebolt of wood is automatically fed to the gang of saws, and as thediameter of the bolt of wood is reduced by removing stock thereof in abrous state the velocity of the revolution of the bolt of wood isproportionately increased as the diameter of the bolt is decreased bymeans of the inward travel of the friction-pulley in engagement with thedriven disk mounted upon the shaft 25.

What I claim is- 1. The combination in a machine of the class described,of a series of rotating saws, a carriage traveling toward the saws,means for revolving a log held on said carriage, a rack moved in onedirection bysaid carriage, means for returning it, a pivoted toothed arcmeshing with said rack, a rotating frictionpinion, a friction-diskoperated by said pinion, a connection between the arc and thefriction-pinion, and intermediate gearing between' the friction-disk andthe means for revolving the log, substantially as described.

2. The combination in a machine of the class described, of a frame, aseries of rotating circular saws mounted thereon, a carriage travelingon the frame, means on said carriage for holding a log, mechanism forrevolving said log, a rack 57 supported by said frame, a lug 63 on thecarriage for operating said rack in one direction, a'weight 62 formoving it in the other direction, a pivoted toothed arc 65 engaging withthe rack, a 1'0- tary friction-pinion 27, a rod 66 connected with thearc and pinion, a friction-disk 26 operated by said pinion, andintermediate gear ing between said disk and the mechanism for revolvingthe log, substantially as described.

3. The combination in a machine of the class described, of a frame, aseries of rotating circular saws mounted thereon, a carriage travelingon said frame, arotating shaft 33 supported by the frame, a worm 38sliding on and revolving with the said shaft, a man- IOO IIO

drel 10 mounted on the carriage, a Worm- Wheel 39 fast on said mandreland coacting with the worm7 a rack 45 attached to the frame, a pinion 44mounted on the carriage and engaging with the rack and intermediategearing between the mandrel l0 and said pinion 44, substantially asdescribed.

4. In a machine of the character described, a frame, a series ofrotating circular saws mounted thereon, a carriage traveling on saidframe, a rotating shaft 33 supported by the frame, a Worm 38 sliding onand revolving with said shaft, a mandrel 10 mounted on the carriage,a'worm-wheel 39 fast on said mandrel and coacting with the Worm, a rack45 pivotally attached to the frame, a pinion 44 mounted on the carriageand engaging with the rack, intermediate gearing between the mandrel l0and said pinion, astepped bracket 47 on which the 'rack rests7 and meansfor tripping said bracket as the carriage nears the end of its motion7substantially as described.

5. Ina machine of the character described, a frame, a carriage, means onsaid carriage for giving a log a rotary motion, apinion also mounted onthe carriage, intermediate gearing connecting the log-turning means withsaid pinion, a rack pivotally connected to the frame at one end, and atripping device operated by the motion of the carriage, as it nears theend of its travel, substantially 'as described.

` 6. Ina machine of the character described, a frame, a carriage havingmeans for giving a log a rotary motion, a pinion mounted on thecarriage, intermediate gearing connecting the pinion and log-turningdevices, arack pivotally connected to the frame at one end, a bracketsupporting the free end of said rack, a lever pivoted on the frame, arod connected to the bracket at one end and to the lever at its otherend, and a tripping-pin on the car- HORACE M. HoovEE.

Witnesses:

WILLIAM WEBSTER, THos. E. BAIED.4

